Romelu Lukau was told to study three world class strikers in order to improve his game

Since then, a scoring drought at club level has ensued, but the Belgium global has continued to find the back of the net for Belgium, doing so again twice against Mexico in a 3-3 draw on Friday.

Martinez, who managed Lukaku during their time at Everton, realised the striker was far from the finished article.

Romelu Lukaku has revealed that Roberto Martinez used to make him watch videos of Hugo Sanchez, Edison Cavani and former red Javier Hernandez to help develop his movement in the box.

Despite failing to score in seven consecutive games for Manchester United, Lukaku enjoyed a sensational start to his career at Old Trafford after leaving Everton in the summer.

"I've improved my movement, especially in the box", Lukaku told Belgian outlet DH. Two years ago, at Everton, Roberto Martinez made me watch videos of my own movement, but also those of other strikers like Hugo Sanchez, Edinson Cavani and Chicharito.

Lukaku ended his seven-game goal drought against Mexico on Friday night and said after the entertaining 3-3 draw: 'It's a relief but I knew it would come. But the 24-year-old's brace over the weekend reminded supporters of an important lesson: that one player alone can not make effective runs in behind; the support from further behind him simply needs to improve.

"You need to sit down and watch the Uruguayan's movement inside the box".